Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 7ef2382f0aca9342…

MALICIOUS

Office (OLE)

53.0 KB Created: 2006-08-31 07:42:00 Authoring application: Microsoft Word 11.0
MD5: 36ffd4fc6c5656b87887aa144edd1236 SHA-1: 91f7314e188ff78ce100c0cfcf4d864121ae82cc SHA-256: 7ef2382f0aca9342001a1cc9669efca51692620ba375b4774e3db610f389f0a8
180 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1566.001 Spearphishing Attachment

The sample is a malicious Office document containing VBA macros, specifically a Document_Open macro designed to execute automatically. The ClamAV heuristics indicate it's a known trojan marker. While the VBA code is truncated, the presence of a Document_Open macro and the ClamAV detections strongly suggest the intent is to download and execute a secondary payload, characteristic of a trojan dropper.

Heuristics 4

  • ClamAV: Doc.Trojan.Marker-40 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Trojan.Marker-40
  • ClamAV detection on extracted artifact critical EXTRACTED_FILE_CLAMAV
    ClamAV flagged at least one file extracted from inside this sample. Even when the wrapping document carries no AV detection of its own, a hit on the carved artifact is a strong indicator the sample is a delivery vehicle.
  • Document_Open macro high OLE_VBA_DOCOPEN
    Document_Open macro
  • VBA macros detected medium OLE_VBA_MACROS
    Document contains VBA macro code

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
a2a242daf2022a18fceb3b2c045188b5232c25988eb012d3eb05f2d5ab15463c		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 5269 bytes
Detection
ClamAV: Doc.Trojan.Marker-2
Obfuscation or payload: unlikely

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